Please note, Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales. Data are available for bulk download.
Base Period
Trend

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Contiguous U.S. Palmer Z-IndexSeptember-November18952024190519151925193519451955196519751985199520052015-4.004.00-3.00-2.00-1.000.001.002.003.00-4.004.00-3.00-2.00-1.000.001.002.003.00ZingChart
Contiguous U.S. Palmer Z-Index
September-November
Period
Z-Index
Rank
(out of 130)
September-November 2024-2.0210
September-November 2023-2.088
September-November 2022-1.6712
September-November 2021-0.6841
September-November 2020-0.9531
September-November 20190.89100
September-November 20182.79128
September-November 2017-0.7339
September-November 2016-1.1225
September-November 20150.5786
September-November 20140.1671
September-November 20130.4680
September-November 2012-1.6216
September-November 2011-0.5246
September-November 2010-0.2855
September-November 20092.26123
September-November 2008-0.0762
September-November 2007-1.2823
September-November 20061.27109
September-November 2005-1.0528
September-November 20042.50126
September-November 2003-0.1159
September-November 20020.7793
September-November 2001-0.7438
September-November 2000-0.0463
September-November 1999-1.8511
September-November 19980.3677
September-November 19970.5786
September-November 19962.65127
September-November 19950.3978
September-November 19940.8497
September-November 19930.95104
September-November 19920.7793
September-November 19910.2773
September-November 1990-0.3651
September-November 1989-0.3254
September-November 1988-0.0961
September-November 1987-1.2624
September-November 19862.92129
September-November 19853.23130
September-November 19842.01120
September-November 19831.31111
September-November 19821.36112
September-November 19810.7290
September-November 1980-0.7737
September-November 19790.3275
September-November 1978-0.9133
September-November 19771.11106
September-November 19760.0867
September-November 19750.8196
September-November 19740.3476
September-November 19731.90119
September-November 19722.36125
September-November 19710.94103
September-November 19701.51113
September-November 19690.1872
September-November 19680.5887
September-November 19670.1269
September-November 1966-0.9232
September-November 19650.5082
September-November 1964-0.6242
September-November 1963-2.167
September-November 19620.0665
September-November 19610.7691
September-November 1960-0.5148
September-November 19591.80117
September-November 1958-0.4250
September-November 19572.34124
September-November 1956-2.524
September-November 1955-0.9034
September-November 1954-1.6513
September-November 1953-2.783
September-November 1952-2.862
September-November 19510.8598
September-November 19500.1470
September-November 1949-0.5246
September-November 1948-0.3651
September-November 1947-0.2855
September-November 19461.82118
September-November 19451.17108
September-November 1944-0.7140
September-November 1943-1.5817
September-November 19420.5082
September-November 19412.26123
September-November 1940-0.5844
September-November 1939-3.261
September-November 1938-1.4321
September-November 1937-0.2757
September-November 1936-1.1027
September-November 1935-0.6242
September-November 1934-0.3553
September-November 1933-2.435
September-November 19320.0766
September-November 1931-1.5318
September-November 1930-0.1060
September-November 19290.8095
September-November 19280.0968
September-November 19270.5786
September-November 19261.80117
September-November 19251.60114
September-November 1924-0.9829
September-November 19231.03105
September-November 1922-2.206
September-November 1921-0.9829
September-November 19200.2874
September-November 19192.18121
September-November 19180.8095
September-November 1917-2.039
September-November 1916-0.5645
September-November 19150.5683
September-November 1914-0.8636
September-November 19131.16107
September-November 19120.0164
September-November 19110.7290
September-November 1910-1.3522
September-November 1909-0.1658
September-November 1908-0.9034
September-November 19070.4279
September-November 19061.28110
September-November 19050.6288
September-November 1904-1.6513
September-November 1903-0.4549
September-November 19020.8699
September-November 1901-1.4919
September-November 19000.90101
September-November 1899-1.1225
September-November 18980.92102
September-November 1897-1.6415
September-November 18961.62115
September-November 1895-1.4720

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